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authorAaron Durbin <adurbin@chromium.org>2016-07-25 11:18:46 -0500
committerAaron Durbin <adurbin@chromium.org>2016-07-27 00:40:05 +0200
commit40d93494c3dcfe7850aed056e1ad9c4b285c0f5b (patch)
treefa117904c80c5b917a3a3a059f0f380406c38a86 /src/device/device_simple.c
parent9cbc90a1f6e197258ed47bc44016640f2b1e5a31 (diff)
downloadcoreboot-40d93494c3dcfe7850aed056e1ad9c4b285c0f5b.tar.xz
device: include devicetree in bootblock stage
Allow bootblock to get access to the static device tree like other early stages. device_romstage.c was renamed to device_simple.c to better articulate the usage since it's not just being used in romstage. BUG=chrome-os-partner:55357 Change-Id: I3d63d2754c737cc738c09a3e3b3b468362fb78d1 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/15837 Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Subrata Banik <subrata.banik@intel.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/device/device_simple.c')
-rw-r--r--src/device/device_simple.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/src/device/device_simple.c b/src/device/device_simple.c
new file mode 100644
index 0000000000..828e99b75e
--- /dev/null
+++ b/src/device/device_simple.c
@@ -0,0 +1,120 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2003-2004 Linux Networx
+ * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
+ * Copyright (C) 2003 Greg Watson <jarrah@users.sourceforge.net>
+ * Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov>
+ * Copyright (C) 2005-2006 Tyan
+ * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <device/device.h>
+#include <device/path.h>
+#include <device/pci.h>
+#include <device/resource.h>
+
+/** Linked list of ALL devices */
+ROMSTAGE_CONST struct device * ROMSTAGE_CONST all_devices = &dev_root;
+
+/**
+ * Given a PCI bus and a devfn number, find the device structure.
+ *
+ * @param bus The bus number.
+ * @param devfn A device/function number.
+ * @return Pointer to the device structure (if found), 0 otherwise.
+ */
+ROMSTAGE_CONST struct device *dev_find_slot(unsigned int bus,
+ unsigned int devfn)
+{
+ ROMSTAGE_CONST struct device *dev, *result;
+
+ result = 0;
+ for (dev = all_devices; dev; dev = dev->next) {
+ if ((dev->path.type == DEVICE_PATH_PCI) &&
+ (dev->bus->secondary == bus) &&
+ (dev->path.pci.devfn == devfn)) {
+ result = dev;
+ break;
+ }
+ }
+ return result;
+}
+
+/**
+ * Given a device pointer, find the next PCI device.
+ *
+ * @param previous_dev A pointer to a PCI device structure.
+ * @return Pointer to the next device structure (if found), 0 otherwise.
+ */
+ROMSTAGE_CONST struct device *dev_find_next_pci_device(
+ ROMSTAGE_CONST struct device *previous_dev)
+{
+ ROMSTAGE_CONST struct device *dev, *result;
+
+ if (previous_dev == NULL)
+ previous_dev = all_devices;
+
+ result = 0;
+ for (dev = previous_dev->next; dev; dev = dev->next) {
+ if (dev->path.type == DEVICE_PATH_PCI) {
+ result = dev;
+ break;
+ }
+ }
+ return result;
+}
+
+/**
+ * Given an SMBus bus and a device number, find the device structure.
+ *
+ * @param bus The bus number.
+ * @param addr A device number.
+ * @return Pointer to the device structure (if found), 0 otherwise.
+ */
+ROMSTAGE_CONST struct device *dev_find_slot_on_smbus(unsigned int bus,
+ unsigned int addr)
+{
+ ROMSTAGE_CONST struct device *dev, *result;
+
+ result = 0;
+ for (dev = all_devices; dev; dev = dev->next) {
+ if ((dev->path.type == DEVICE_PATH_I2C) &&
+ (dev->bus->secondary == bus) &&
+ (dev->path.i2c.device == addr)) {
+ result = dev;
+ break;
+ }
+ }
+ return result;
+}
+
+/**
+ * Given a PnP port and a device number, find the device structure.
+ *
+ * @param port The I/O port.
+ * @param device Logical device number.
+ * @return Pointer to the device structure (if found), 0 otherwise.
+ */
+ROMSTAGE_CONST struct device *dev_find_slot_pnp(u16 port, u16 device)
+{
+ ROMSTAGE_CONST struct device *dev;
+
+ for (dev = all_devices; dev; dev = dev->next) {
+ if ((dev->path.type == DEVICE_PATH_PNP) &&
+ (dev->path.pnp.port == port) &&
+ (dev->path.pnp.device == device)) {
+ return dev;
+ }
+ }
+ return 0;
+}